Compile Free Launch

After java 11, now a single java file might be tested easily with compiling as well. You can check the below given example:

ApiTester.java

public class Tester {
   public static void main(String[] args) {
     System.out.println("Hello World!"); 
   }
}

Old Way of Running the file

$ javac ApiTester.java
$ java Tester
Hello World!

A new way of Running file

$ java ApiTester.java
Hello World!

This new attribute will help the developer to quickly test functionality without compiling it before running a code.